I dont think this is Shunkosai Hokushu whose signature is like this one: https://en.wikipedia.org/wiki/Shunk%C5%8Dsai_Hokush%C5%AB#/media/File:Signatures_of_Shunk%C3%B4sai_Hokush%C3%BB_from_left_to_right-_Shunk%C3%B4_and_Shunk%C3%B4sai_Hokush%C3%BB.jpg